Glixal ATMT1-021 GY6 125cc 150cc to 155cc 58.5mm Performance Cylinder Head Assy with valves for 152QMI 157QMJ Chinese Scooter Moped ATV Go Kart (None EGR Type) Fits the GY6 125cc to 155cc Engine with 60mm Height Head,76mm Bolt Pattern & 4 Bolt Valve Cover Combustion Chamber Diameter-58.5mm High Performance 58.5mm Cylinder Head for 152QMI/157QMJ Engine This is a Non EGR Head, Does Not Have the EGR Port